<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #table{
            width: 500px; 
            height: auto;
            border-collapse: collapse;
            padding: 19px;
            margin-top: 300px;
            padding: 20%;
        }
        tr{
            height: auto;
            width: 250px;
            text-align: center;
        }
        th{
            height: auto;
            width: 100px;
            text-align: center;
        }
        td{
            height: auto;
            width: 100px;
            text-align: center;
        }
    </style>
</head>
<body>
    <table border="1" id="table">
        <tr>
            <th>姓名</th>
            <th>性别</th>
            <th>成绩</th>
            <th rowspan="3">无</th>
        </tr>
        <tr>
            <td>张三</td>
            <td>男</td>
            <td>240</td>
        </tr>
        <tr>
            <td>李四</td>
            <td>男</td>
            <td>220</td>
        </tr>
        <tr>
            <td colspan="4">无</td>
        </tr>
    </table>
</body>
</html>